Grinding and polishing machine



(No Model.) 2 Sheets-Sheet 1.

E. WARE GRINDING AND POLISHING MACHINE. No. 287,744. I v Patented Oct.30, 1883.

(No M'odL). l 2 Shee tsSheet 2.

E. R. WARB- GRINDING AND POLISHING MACHINE.

No. 287,744. Patented Oct. 30,1883.

I 'INVENTOR I 'zfl K mm WITNESSES I ATTORNEYS N. PETERS. Phmo-Umagnphw.Wu

- UNITED .STATE9 P TENT ()FFICEQ EDMUND R. WARE, OF wononsrnn,MASSACHUSETTS.

GRlNDlNG AND POLISHING MA CHINE SPECIFICATION formingpart of LettersPatent No..287,744, dated October 30, 188

Application filed March 21,1ess.' (No model.)

To all whom it may concern:

Be it known that I, EDMUND R. WARE, a citizen of the United States,residing at Worcester, in the county'of Worcester and State ofMassachusetts, have invented certain new and useful Improvements inGrinding and Polishing Machines, of which the following is aspecification, reference being had therein to the accompanying drawings.

Figure 1 embodying my invention. Fig. 2 is .a top or plan view, thesupporting skeleton or frame having been removed; and Fig. 3 is aperspective view, showing a modification of the 1 supporting skeleton orframe. 7.

Referring to the drawings, A A represent the frame-work which supportsthe operative parts of themachine, andB is a bed-plate.

C G are vertical posts arranged upon the 2 opposite sides'of themachine, and about midway between the lugs or posts of the frame.

D D E E e constitute a frame mounted to slide vertically upon the posts0 0 when actuated by certain devices, to be hereinafter described. r

F is an emery-wheel shaft mounted in bear- .ings b, which projecthorizontally fromthe sliding frame, theshaft being stepped upon andadjusted by a set-screw, f, in the lower 0 end of thelower bearings.

G is an emery-wheel or other suitable pol-' ishing orgrinding wheel,mounted upon and carried by the upper end of shaft F, to which a rapidrotary motion is given by means of a 5 belt connecting a belt-pulley, g,on the shaft with any suitable motor.

His a driving-shaft mounted in bearingsc c, which project from the post0, the shaft being driven byapulley,h, and belt. (Not shown.) 0 I is avertical shaft,mounted upon the frame A A in suitable bearings, andcarrying a wormwheel, 2', which is actuated by a worm on thedriving-shaft H. I Y J is a grooved cam mounted on vertical 5 shaft I,and secured thereto by the set screw (see Fig. 1) or otherwise. r

is a stud projecting from the vertical bar 6 of the sliding frame, andentering the groove of the'cam, the stud,by preference,being providedwith an anti-friction roller.

1s a perspective view of-a machine By means of the mechanism thusdescribed a rapid rotarymotion and also a rising-and-falling motion maybe imparted to the shaftF and the emery-wheel or other grinding orpolishing wheel mounted thereon, as will be readlly understood fromanexamination of the figures 7 without further explanation. A

I will now describe the mechanism for supporting the article to beground or polished.

Referring to Fig. 1, K K are horizontal bearers, provided upontheirupper faces with a series of circular seats or'recesses, 70 k, andupon their'under faces with set-screws n n. L L are slottedsupporting-arms, each pivoted at its upper end to the central part ofone of the bearers K. These supporting-bars slide vertically betweenprojecting lips 11 a,

(see Fig. 2,) which are cast upon the frameA m m are screw-threadedstuds arranged about centrally between each adjacent pair of lips a. a;and M M are thumb-screws on the threaded bolts m m, the bolts passingthrough the-slots in the supporting-arms L L. N N are carrying-bars,circular in cross-section, and seated in the circular recesses k k. 1 Aswill be seen in Fig. 1, the recesses are open each at the top; but theirwalls overlap and engage" with the upper faces of the bars, so as toresist the upward thrust of the set-screws n n, and thus confine the barin position, while its upper face projects above the level of thebearer,

and thus receives the wear of the article which is being ground. Anydesired number of bars N may be used, and it will'be readily seenthat-the devices just described constitute a skeleton or supportingframe which may, by means of threaded bolts m m and thumb-nuts ,7

'MM, be placed in various positions,-to provide for grinding the desiredangles or bevels.

' Referring to Fig. 3, 0 isa curved bar bolted upon one side of the mainframe, and provided with a slot formed in an arc of a circle which isdescribed from the threaded bolt m. p is a threaded bolt passing throughthe slot in the curved bar 0 and through the straight slot in thesupporting-arm L. P is a thumbnut upon bolt 10, the head at the otherend of the bolt being by preference seated 'in a recess upon the innerface of the curved bar 0, upon both sides of the curved slot, wherebythe 10c other reasons,

bolt is free to traverse the curved slot, but is prevented from turningaround. Of course there is a similar slotted curved bar, 0, bolt 1), andthumb-nut P on the opposite side of the machine, for supporting theother bar L, and by means of these devices the skeleton frame can besupported in a much greater variety of positions than the correspondingframe shown in Fig. 1 can be by the devices illustrated in said Fig. 1.

I do not wish to be limited'to the employment of round carrying-bars NN, asbars of other form in crosssection might be used withcorrespondingly-shaped seats in the bearers K K; but I prefer roundones, because, among they can be made of gas-pipe, and therefore arevery light, and, further, because, when their upper surfaces becomeworn, I can turn them around a little, and thus present new surfaces,whereas with bars which are many-sided in cross-sectionsay triangular-ifturned around at all, they must be turned, say, a third or a quarter orso, depending upon the number of their sides. One advantage which thisconstruction possesses over an ordinary slotted table is this: Theposition of the bars may be varied to correspond with the inclination ofthe bearers relative to the grinding-wheel, so that under varyinginclinations a support for the article to be ground may be had in closeproximity to the emerywheel. Another advantage which my constructionpossesses is that the carrying-bars N N can slide longitudinally in thebearers K K, thus enabling the operator to extend the support for thearticle to be ground in either direction upon opposite sides of thegrinding-wheel and in the direction of the length of the carrying-bars,and by reason of the bearers being provided with a series of seats forthe carrying-bars the width of the support upon either side of thegrinding-wheel and in the direction of the length of the bearers may beincreased at will. It will be seen that the stationary bolt on and themovable bolt seated in the slot of the supportingarm L, serve as guidesto determine the line of reciprocation of said bar in substantially thesame manner as do the lips a a in Figs. 1 and 2, the construction shownin Fig. 3 having the advantage that the line of reciprocation may bevaried by shifting the position of the lower bolt, 1;. The combinationof an adjustable inclined support for the article to be ground with areciprocating cylindrical grinding-wheel possesses many advantages overthe combination of an adjustable support with a non-reciprocatinggrinder, whether cylindrical or conical.

I do not wish to be limited to the precise construction of parts shownin the drawings for supporting and adjusting the bars N, as manymodifications thereof might be made without departing from the spirit ofthat part of my invention which relates to the construction of theskeleton support to the article to be ground and the combinationtherewith of devices for supporting the same in different positionsrelative to the grinding-wheel.

I am aware that grinding and polishing ma- 7o chines have beenconstructed with central wheels mounted upon vertical shafts andsurrounded by substantially horizorital and adjustable tables.

Iam also aware that this class of machines have been provided withsubstantially horizontal and adjustable bars for supporting the articleto be ground, and therefore do not claim such constructions, broadly;but I believe I am the first to construct a support for the article tobe ground, consisting of a skeleton or frame consisting, essenti ally,of parallel bars arranged upon opposite sides of a grinder under suchconstruction and arrangement of parts that the bars may be so adjustedthat one end of each bar shall be higher than its opposite end, thusinclining the bars to the plane of revolution of the grinder, and sothat the bars, while retaining their parallelism to the horizon, may bearranged in different planes, so that a bar lying transversely of theseparallel bars will be inclined to the plane of rotation of the grinder.This construction possesses many advantages over a flat table having acontinuous surface, even though such table be capable of adjustment inall direct-ions. For i11- stance, by reference to Fig. 1 it will be seenthat the carriers KK may be so adjusted that the lower ends of theparallel bars NN shall be at a comparatively obtuse angle to thegrinder,and then the bars may be moved endwise and downward in their bearers, soas to give the desired length of support below the grinder. Again, incase the bearers be adjusted to the position indicated in Fig. 3, theparallel bars may be removed from above the grinder and placed below it,for the purpose of furnishing a wide support for the article to beground. Again, it will be found desirable to use such an adjustableskeleton supporting-surface on account of irregularities in the outlineof the article to be ground, because such'projeetions from their uppersurface or their lower surface, which would interfere with properlymanipulating them upon a smooth flat surface, can enter between theparallel bars N N, thus facilitating a proper handling of them.

What I claim is- 1. In a machine for grinding and polishing, thecombination, with the main frame, of the bearers-pivotally attached tothe adjustable vertical supporting-arms, in combination with thelongitudinally-adjustable carrying-bars, substantially as set forth.

2. In a machine for grinding and polishing, the combination, with themain frame, of the series of parallel carrying-bars, two bearersarranged on opposite sides of the grindingwheel and below thecarrying-bars, and two independently adjustable supporting arms, eachpivoted at its upper end to one of the bearers, substantially as setforth.

7. In a machine for grinding and polishing, the combination, with themain frame, of the bearers, the supporting-arms, each pivoted at 40 itsupper end to one of the bearers and slotted longitudinally, pivotsconnecting the carrying-bars to the main frame,longitudinally-adjustable clamping-screws arranged in the slot ted arms,and the parallel carrying-bars, sub- 4 5 stantially as set forth.

- 8. Ina machine for grinding and polishing, the combination, with themain frame, of a support for the article to be ground, constructed witha central openingto receivethe grinder, 5'0

3. In a machine for grinding and polishing, the combination, with themain frame, of the carriers, each provided with a series of seats openat the top, in combination with a series 5 of parallel carrying-barsmounted in the seats, and having the upper surfaces projecting above theseats, substantiallyas set forth.

4. In a machine forgrinding and polishing, the combination, with themain frame, of parallel carrying-bars, bearers below the carrying-barsand at right angles thereto, supporting-arms, each pivoted at its upperend to the central part of one of the bearers and slottedlongitudinally, guides to regulate the line of reciprocation of thesupporting -arms, and clampingscrews securing the arms to the main frameof the machine, substantially as set forth.

5. In a machine for grinding and polishing, a support for the article tobe ground, consisting of the carriers, each provided upon opposite sidesof the grinder with a series of seats, in combination with aseries ofremovable parallel carrying bars mounted in the seats, and mechanism fortilting the bearers relative to the grinder, while the carryingbarsremain in substantially horizontal planes, substantially as set forth.

6. In a machine for grinding and polishing, the combination, with themain frame, of the bearers, the supporting-arms, each pivoted at itsupper end to one of the bearers, pivots connecting the supporting-armswith the main frame, laterally-adj ustable clamping-screws securing thelower ends of the'arms to the main frame, and the parallelcarrying-bars, substantially as set forth.

and supported on its opposite sides upon Vertically-adj ustable swingingsupporting-arms, whereby both sides of the support may be tilted to varythe inclination of the support relative to the forth.

' 9. In a machine for grinding and polishing, the combination, withthe-main frame, of a support for the article to be ground,constructed ofsubstantially parallel. bars arranged to 60 form a skeleton, means foradjusting them by raising one end of each bar above its opposite end,and means foradjusting them by raising one bar bodily above the adjacentbar while in a parallel plane therewith, substan- 65 tially as setforth.

In testimony whereof I affix my signature Y in presence of twowitnesses.

EDMUND R. WARE.

Witnesses: H. H. DOUBLEDAY, J. S. BARKER.

grinder, substantially as set 55

